Third-rail system implemented over 100 years ago

third rail — Research and Writing — ADAM S. ALSOBROOK, AIA

Third rail system hi-res stock photography and images - Alamy

How California's Bullet Train Went Off the Rails - The New York Times

Subway Systems

Why do most American heavy rail systems draw power from a third rail, while many non-American systems do not? - Quora

Bipartisan Infrastructure Law Information from FRA

How China's high-speed rail network got built so fast

Railroad Extra - THE THIRD RAIL SYSTEM ON THE NEW HAVEN RAILROAD

Chapter 4 - Case Examples, Third Rail Insulator Failures: Current State of the Practice

A brief visual history of rail electrification in Italy